Valve-gear.



N 729,313 'PATENTED MAYi26, 1903.-

J. 1;. FENTON,

VALVE GEAR.

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UNITED STATES Patented May 26, 1903.

PATENT OFFICE.

VALVE-GEAR.

SPECIFICATION forming part of Letters Patent No. 729,313, dated May 26,1903.

Application filed February 11, 1903. Serial No- 142,823- (No model.)

and arranged to enable the operator to quickly reverse the enginepto cutoff the .admission of the motive agent to a nicety, to control theadmission of the motive agent to and from the cylinders in propersuccession and according to the speed desired and the load carried.

The invention consists of novel features and parts and combinations ofthe same, as Will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure l isa side elevation of the improvement as applied to a threecylinder engine. Fig. 2 is a sectional side elevation of.v the same onthe line 2 2 of Fig. 3. Fig.3 is a crosssection of the same on the line3 3 of Fig. 1. Fig. 4. is a rear face view of the admission and exhaustvalve. Fig.5 is a sectional side elevation of the improvement on theline 5 5 of Fig. 3. Fig. 6 is a similar view of thesame on the line 6 6of Fig. 3. Fig. 7is a like view of the same on the line 7 7 of Fig. 3.is a similar view of the improvement shown in Fig. 6, the parts being ina differentposi; tion; and Fig. 9 is a face view of a bearing for themain shaft.

The engine-cylinders A, A, and Aiaresymf" metrically disposed on aclosed casing B, into which open the inner ends of the said cylinders,and in the latter are mounted to reciprocate istons O, O, and Cconnectedbypitmen D, D, and D with the crank-arm E5 of the main shaft E,journaled in suitable Fig. 8'

rection in which the engine is to run.

bearings on the casingB and in the outer end of a steam-chest F,boltedor otherwise secured to the face'B of the casing B.

The steam-chestF is provided with a steaminlet pipe G, connected with aboiler or other suitable source of motive-agent supply, and anexhaust-pipe H leads from the casing B, preferably at the bottomthereof, as plainly indicated in the drawings.

Cylinder-ports a, a, and a? extend from the outer ends of the cylindersand lead to the face 13 of the casing, and the inlet ends of the saidports at the face B are arranged in a circle to register with elongatedports I), b, and 19 formed in a circular reversing and shut-off valve I,concentric with the shaft E, as plainly illustrated in the drawings.

The valve I is mounted to turn on the hub J of a cut-off valve J, havingpairs of ports 0, c, and 0 adapted, to register with the ports 12, b,and b in the reversing and shutoff valve I. The pairs of ports 0, c, ando are adapted to register with an admissionport (1, formed in anadmission and exhaust valve K, mounted to turn loosely on the shaft E,and the rear face of this admission and exhaust valve K is provided withan exhaustcavity 6, opening to a central aperture J 2 in the valve J,which aperture registers with a central aperture. 1, formed in the valve1, and thisaperture registers with an opening B leading to the inside ofthe casing B, as plainlyshown in Fig. 3.

On the outerface of the admission and exhaust valve Kare arranged spacedpins K and K (see Figs. 3 and 5,) adapted to be engaged by a pin Kextending from a hub K secured to the main shaft E, so that when thelatter rotates the pin K engages either of the pins K or K toturn thevalve K in theTdihe valves I and J are under the control of the operatorand are adapted to turn independentlyone of the other, and,f0r this.purpose the. peripheral face of'the valve I is'provided with gear-teeth1 (see Fig. 7) inv mesh with a segmental gear-wheel "L, attached to theinner'end of a shaft L, provided at its outer erator. The other valve Jis provided on its peripheral face with gear-teeth J in mesh with asegmental gear-wheel N, fastened on the inner end of a hollow shaft N,journaled in suitable hearings on the steam-chest F, and on the outerend of this shaft N is secured a handle N likewise within reach of theoperator. As shown in Fig. 3, the shaft L has its bearings in the hollowshaft N.

Now by the arrangement described the operator in swinging the handle Lto a vertical position causes its shaft L and segmental gear-wheel L toturn the valve I into a shutoff positionthat is, to move the ports I),b, and 12 out of register with the cylinder-ports a, a, and a When thehandle L is moved to the right into the position shown in Figs. 1, 3,and 7, then the ports b, Z), and b register with the ports d, a, and aand when the handle L is thrown over into a left-hand-side position thenthe valve I is turned so as to bring the ports b, b, and b in registerwith the ports a, a and a to reverse the engine. The valve J is turnedin asimilar manner on swinging the handle N from a vertical position tothe right or to the left; but in this case the position of the handle Ndetermines the relation of the pairs of ports 0, c, and c to thecorresponding ports I), b, and lfi-that is, only one of the ports ofeach pair may be moved in register with the corresponding port in thevalve I to reduce the admission of steam to the said ports and to thecylinderports to a nicetyand hence the operator is enabled to give moreor less steam by manipulating the handle N correspondingly, according tothe speed desired and to the load connected with the main shaft E. It isunderstood that when the Valve I is shifted to reverse then theadmission and exhaust valve K remains stationary for a short timethatis, until the pin K has traveled from the pin K over onto the pin K tonow carry the pin along and with it the valve in the reverse directionof the arrow f.

The valves I and K are approximately the same in general construction asthe corresponding valves shown and described in the application forLetters Patent No. 102,195, filed by me April 10, 1902, and hencefurther description of the same is not deemed necessary, it being,however, understood that the cut-01f valve J is interposed between thevalves I and K and has a pair of ports for each port in the valve I toregulate the admission and exhaust of the steam to a nicety.

A bearing 0 is preferably located inthe opening B of the casing to givethe main shaft E as much support as possible to insure an easy runningof the engine.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A valve-gear for multiple engines, comprising arevoluble admission and exhaust valve, rotating with the engine-shaft, areversing and shutoff valve, adapted to be turned and controlling themotive agent to and from the cylinder-ports, and a cut-off valve,adapted to be turned independent of the said reversing and shut-oifvalve, and interposed between the said admission and exhaust valve andthe reversing and shut-off valve, as set forth.

2. A valve-gear for multiple engines, comprising a revolubleadmission'and exhaust valve, rotating with the engine-shaft, a reversingand shut-off valve, adapted to be turned and controlling the motiveagent to and from the cylinder-ports, and a cut-off valve, adapted to beturned independent of the said reversing and shut-off valve, andinterposed between the said admission and exhaust valve and thereversing and shut-01f valve, the said cut-01f valve having pairs ofports, each pair for register with a port in the said reversing andshut-0E valve, as set forth.

A valve-gear for multiple engines, comprising a revoluble admission andexhaust valve, rotating with the engine-shaft, a reversing and shut-0Evalve, adapted to be turned and having elongated ports, each forregister with a corresponding cylinder-port, to control the admissionand exhaust of the motive agent to and from the cylinders, and a cut-offvalve, adapted to be turned independent of the said reversing andshut-off valve, and interposed between the said admission and exhaustvalve and the said reversing and shut-off valve, the said cut-off valvehaving pairs of ports, one pair for each of the elongated ports in thesaid reversing and shut-off valve, as set forth.

4. A valve-gear for multiple engines, comprising a revoluble admissionand exhaust valve, rotating with the engine-shaft, a reversing andshut-off valve, adapted to be turned and having elongated ports, eachfor register with a corresponding cylinder-port, to control theadmission and exhaust of the motive agent to and from the cylinders, anda cut-01f valve, adapted to be turned independent of the said reversingand shut-01f valve, and interposed between the said admission andexhaust valve and the said reversing and shut-0E valve, the said cut-0Evalve having pairs of ports, one pair for each of the elongated ports inthe said reversing and shut-01f valve, the said pairs of ports beingalso adapted to register alternately with the admission-port and theexhaust-cavity in the said admission and exhaust valve, as set forth.

5. A valve-gear for multiple engines, comprising a revoluble admissionand exhaust valve, rotating with the engine-shaft, a reversing andshut-off valve, adapted to be turned and controlling the motive agent toand from the cylinder-ports, a cut-off valve, adapted to be turnedindependent of the said reversing and shut-0E valve, and interposedbetween the said admission and exhaust valve and the reversing andshut-0E valve, a handled shaft carrying a segmental gear-wheel in meshwith teeth on the said reversing and shut-0E valve, and a second handledshaft, carrying a segmental gear-wheel, in mesh with the said cut-offvalve, to allow the operator to turn the said reversing and shut-offvalve and the said cut-0E, valve independently one of the other, as setforth.

In testimony whereof I have signed my name to this specification in thepresence of 10 two subscribing witnesses.

JOSEPH T. FENTON.

Witnesses:

H. MEIER, R. FROST.

